Video demultiplexing based on meaningful modes extraction

Abstract

Methods and systems for grouping video frames. The video frames may be from a multiplexed stream of video frames from a plurality of video sources. In some embodiments video frames are grouped by determining if the video frames share meaningful modes for values representative of features of the video frames.

1. A method, using a computer, of grouping video images, comprising:
 receiving video images, the video images including video images of a plurality of locations; 
 calculating values of a plurality of video image features for the video images; 
 determining concentrations of the values greater than an average expectation concentration; and 
 grouping video images having common values of features in the concentrations. 
 
     
     
       2. The method of  claim 1  wherein the concentration of the values greater than an average expectation concentration is determined using at least one of a statistical distribution, a stochastic process, a uniform distribution, a Gaussian distribution, or a binomial distribution. 
     
     
       3. The method of  claim 1  wherein the concentrations of the values defines a meaningful mode in a histogram. 
     
     
       4. The method of  claim 1  wherein determining concentrations of the values greater than an average expectation concentration comprises:
 assigning to each value a number of occurrences of the value, the number of occurrences corresponding to the number of video images having the value of the feature; 
 comparing the number of occurrences to an expected concentration; and 
 determining intervals of values above the expected concentration. 
 
     
     
       5. The method of  claim 4  wherein grouping video images having common values of features in the concentrations comprises:
 identifying video images having feature values in the same meaningful modes.